Nature of Banking Activities and Significant Accounting Policies - Additional Information (Details)		12 Months Ended
	Oct. 01, 2020 shares	Dec. 31, 2020 USD ($) Office
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Number of banking offices | Office		11
Number of days past due before a loan is considered nonaccrual		90 days
Uncertain tax positions | $		$ 0
ASU 2018-13 [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect		true
ASU 2020-04 [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Mar. 12, 2020
Minimum [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Number of days past due after loan is considered accrual		90 days
Useful lives		3 years
Percentage of tax benefit		50.00%
Minimum [Member] | Software [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Useful lives		3 years
Maximum [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Useful lives		39 years
Maximum [Member] | Software [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Useful lives		5 years
Virginia National Bankshares Corporation [Member] | Merger Agreement [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Common stock holders right to receive shares for each share | shares	0.675